:root{--blue:#0753A5;--blue-900:#062D5A;--yellow:#FFCB05;--ink:#10243D;--muted:#6B7E92;--line:#DCE7F2;--soft:#F4F8FC;--danger:#D93D3D;--success:#17935B;--shadow:0 18px 50px rgba(4,42,83,.12)}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#F4F7FB}button,input,textarea,select{font:inherit}a{text-decoration:none;color:inherit}.hidden{display:none!important}.full-screen{min-height:100vh}.auth-bg{background:radial-gradient(circle at 15% 20%,rgba(255,203,5,.2),transparent 24%),linear-gradient(135deg,#041E3E,#0753A5 72%,#0A69C4)}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:28px}.auth-card{width:min(440px,100%);background:#fff;border-radius:24px;padding:34px;box-shadow:0 30px 80px rgba(0,20,50,.28)}.wide-auth{width:min(560px,100%)}.auth-brand{display:flex;align-items:center;gap:14px;margin-bottom:28px}.auth-brand img{width:125px;height:44px;object-fit:contain;object-position:left}.auth-brand>div{display:flex;flex-direction:column}.auth-brand strong{color:var(--blue-900)}.auth-brand span{font-size:.76rem;color:var(--muted)}.auth-card h1{font-size:1.9rem;letter-spacing:-.03em;margin:0 0 7px;color:var(--blue-900)}.auth-card>p{color:var(--muted);font-size:.92rem;margin:0 0 25px}.auth-foot{text-align:center!important;margin:22px 0 0!important}.auth-foot a{color:var(--blue);font-weight:700;font-size:.86rem}.admin-app{min-height:100vh;display:grid;grid-template-columns:250px 1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;background:linear-gradient(180deg,#052A55 0,#031C39 100%);color:#fff;display:flex;flex-direction:column;z-index:20}.side-brand{height:86px;padding:17px 20px;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:12px}.side-brand img{width:78px;height:40px;object-fit:contain;background:#fff;border-radius:9px;padding:4px}.side-brand div{display:flex;flex-direction:column}.side-brand strong{font-size:.95rem}.side-brand span{font-size:.65rem;opacity:.65}.side-nav{padding:18px 12px;display:flex;flex-direction:column;gap:5px;overflow:auto}.side-nav button{width:100%;border:0;background:transparent;color:rgba(255,255,255,.72);display:flex;align-items:center;gap:12px;text-align:left;padding:11px 13px;border-radius:10px;cursor:pointer;font-weight:700;font-size:.86rem}.side-nav button span{width:20px;text-align:center}.side-nav button:hover,.side-nav button.active{background:rgba(255,255,255,.1);color:#fff}.side-nav button.active{box-shadow:inset 3px 0 0 var(--yellow)}.side-bottom{margin-top:auto;padding:15px 16px 20px;border-top:1px solid rgba(255,255,255,.08);display:flex;flex-direction:column;gap:7px}.side-bottom a,.side-bottom button{border:0;background:transparent;color:rgba(255,255,255,.7);text-align:left;padding:8px 10px;cursor:pointer;font-weight:700;font-size:.8rem}.side-bottom a:hover,.side-bottom button:hover{color:#fff}.admin-main{grid-column:2;min-width:0}.admin-top{height:72px;background:#fff;border-bottom:1px solid #E1EAF3;display:flex;align-items:center;padding:0 28px;position:sticky;top:0;z-index:10}.admin-top>div:first-of-type{display:flex;flex-direction:column}.admin-top strong{font-size:1rem;color:var(--blue-900)}.admin-top span{font-size:.72rem;color:var(--muted)}.admin-user{margin-left:auto!important;display:flex!important;align-items:center;gap:10px}.admin-user i{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#E9F4FF;color:var(--blue);font-style:normal;font-weight:900}.admin-menu{display:none;border:0;background:transparent;font-size:1.4rem;margin-right:10px}.admin-content{padding:28px}.view{display:none}.view.active{display:block}.welcome-card{background:linear-gradient(120deg,#06366D,#0A65B7);color:#fff;border-radius:20px;padding:28px 30px;display:flex;align-items:center;justify-content:space-between;gap:20px;position:relative;overflow:hidden;margin-bottom:20px}.welcome-card:after{content:"";position:absolute;width:220px;height:220px;border-radius:50%;background:var(--yellow);right:-80px;top:-100px;opacity:.16}.welcome-card>div{position:relative;z-index:1}.welcome-card span{font-size:.72rem;letter-spacing:.13em;color:var(--yellow);font-weight:900}.welcome-card h1{font-size:1.9rem;margin:5px 0 2px;letter-spacing:-.03em}.welcome-card p{margin:0;color:rgba(255,255,255,.78);font-size:.9rem}.welcome-card .btn-primary{position:relative;z-index:1}.metric-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-bottom:20px}.metric{background:#fff;border:1px solid #E0EAF3;border-radius:16px;padding:18px;min-height:112px;box-shadow:0 8px 22px rgba(5,54,104,.04)}.metric .metric-icon{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#EAF5FF;color:var(--blue);margin-bottom:12px;font-weight:900}.metric strong{display:block;font-size:1.45rem;color:var(--blue-900);line-height:1}.metric span{font-size:.72rem;color:var(--muted)}.panel{background:#fff;border:1px solid #E0EAF3;border-radius:18px;padding:22px;box-shadow:0 10px 28px rgba(5,52,100,.05)}.panel+.panel{margin-top:20px}.narrow-panel{max-width:620px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}.panel-head h2{font-size:1.12rem;margin:0 0 3px;color:var(--blue-900)}.panel-head p{font-size:.78rem;color:var(--muted);margin:0}.btn-primary,.btn-secondary,.btn-danger{border:0;border-radius:10px;padding:11px 15px;font-weight:800;cursor:pointer}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:#06488E}.btn-primary.small,.btn-secondary.small,.btn-danger.small{font-size:.76rem;padding:8px 11px}.btn-secondary{background:#EEF4FA;color:#294964}.btn-danger{background:#FFE9E9;color:#B42222}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:.81rem}thead th{text-align:left;color:#72859A;font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}tbody td{padding:13px 12px;border-bottom:1px solid #EEF3F7;color:#34495F;vertical-align:top}tbody tr:last-child td{border-bottom:0}.status{display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;font-size:.67rem;font-weight:900}.status.on{background:#E7F7EF;color:#168653}.status.off{background:#F1F3F5;color:#73808C}.actions{display:flex;gap:6px;flex-wrap:wrap}.card-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.slide-admin-card{display:grid;grid-template-columns:150px 1fr;gap:16px;border:1px solid #DFE9F2;border-radius:15px;padding:13px}.slide-admin-card img{width:150px;height:95px;border-radius:10px;object-fit:cover;background:#EDF4FA}.slide-admin-card h3{margin:2px 0 5px;font-size:.96rem;color:var(--blue-900)}.slide-admin-card p{margin:0 0 10px;color:var(--muted);font-size:.76rem}.slide-admin-card .meta-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.simple-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.simple-item{border:1px solid #DFE9F2;border-radius:14px;padding:16px;display:flex;align-items:flex-start;gap:12px}.simple-item .item-icon{width:40px;height:40px;border-radius:10px;background:#EAF5FF;color:var(--blue);display:grid;place-items:center;font-weight:900;flex:none}.simple-item .grow{flex:1;min-width:0}.simple-item h3{font-size:.91rem;margin:1px 0 4px}.simple-item p{font-size:.75rem;color:var(--muted);margin:0 0 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.simple-item .actions{justify-content:flex-end}.settings-groups{display:grid;gap:18px}.settings-groups fieldset{border:1px solid #DFE8F1;border-radius:14px;padding:18px;margin:0}.settings-groups legend{font-weight:900;color:var(--blue-900);padding:0 7px;font-size:.85rem}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.form-grid.one{grid-template-columns:1fr}.form-grid label{display:flex;flex-direction:column;gap:6px;font-size:.76rem;font-weight:800;color:#38516A}.form-grid input,.form-grid textarea,.form-grid select{width:100%;border:1px solid #CFDCE8;border-radius:10px;padding:10px 11px;background:#fff;color:var(--ink);outline:none}.form-grid input:focus,.form-grid textarea:focus,.form-grid select:focus{border-color:#75A8D8;box-shadow:0 0 0 3px rgba(7,83,165,.08)}.form-grid input[type=color]{height:42px;padding:4px}.form-grid small{font-weight:500;color:var(--muted)}.span2{grid-column:1/-1}.upload-box{margin-top:13px;border:1px dashed #B7CDE1;border-radius:11px;padding:12px 14px!important;display:flex!important;flex-direction:row!important;align-items:center;gap:10px!important;background:#F8FBFE;cursor:pointer}.upload-box input{width:auto!important}.form-msg{font-size:.8rem;margin-top:12px;min-height:20px}.form-msg.error{color:#C22B2B}.form-msg.ok{color:#168653}.modal{position:fixed;inset:0;background:rgba(3,23,45,.62);z-index:100;display:grid;place-items:center;padding:22px}.modal-card{width:min(760px,100%);max-height:90vh;overflow:auto;background:#fff;border-radius:20px;padding:24px;box-shadow:0 30px 90px rgba(0,20,45,.35)}.modal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}.modal-head h2{margin:0 0 3px;color:var(--blue-900)}.modal-head p{margin:0;color:var(--muted);font-size:.78rem}.modal-head button{border:0;background:#EEF3F8;width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:1.3rem}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}.toast{position:fixed;right:22px;bottom:22px;z-index:200;background:#0B2F57;color:#fff;padding:12px 16px;border-radius:11px;box-shadow:0 14px 32px rgba(0,0,0,.22);opacity:0;transform:translateY(10px);pointer-events:none;transition:.25s}.toast.show{opacity:1;transform:none}code{background:#F0F4F8;padding:2px 5px;border-radius:5px}
@media(max-width:1180px){.metric-grid{grid-template-columns:repeat(3,1fr)}.card-list{grid-template-columns:1fr}}
@media(max-width:880px){.admin-app{grid-template-columns:1fr}.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:none}.admin-main{grid-column:1}.admin-menu{display:block}.admin-content{padding:18px}.simple-list{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.span2{grid-column:auto}.admin-top{padding:0 18px}}
@media(max-width:560px){.metric-grid{grid-template-columns:repeat(2,1fr)}.welcome-card{align-items:flex-start;flex-direction:column}.panel{padding:16px}.slide-admin-card{grid-template-columns:1fr}.slide-admin-card img{width:100%;height:145px}.auth-card{padding:26px 22px}.admin-user span{display:none}.modal{padding:10px}.modal-card{padding:18px}}
.course-admin-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.course-admin-card{display:grid;grid-template-columns:160px 1fr;gap:15px;border:1px solid #DFE9F2;border-radius:15px;padding:13px}.course-admin-card img{width:160px;height:110px;object-fit:cover;border-radius:10px;background:#EDF4FA}.course-admin-card h3{font-size:.96rem;margin:2px 0 4px;color:var(--blue-900)}.course-admin-card p{font-size:.76rem;color:var(--muted);margin:0 0 8px}.course-admin-meta{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:9px}.course-admin-meta span{background:#F1F6FA;color:#506B83;border-radius:999px;padding:4px 7px;font-size:.65rem;font-weight:800}.status.open{background:#E7F7EF;color:#168653}.status.closed{background:#F5ECEC;color:#9A4444}.course-category-admin .item-icon{background:#FFF4BE;color:#806300}
@media(max-width:1180px){.course-admin-list{grid-template-columns:1fr}}
@media(max-width:560px){.course-admin-card{grid-template-columns:1fr}.course-admin-card img{width:100%;height:170px}}